Vapor electric lamp



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F. AVKHXMEET AL VAPOR ELECTRIC LAMP lFiled May l2y 1922 l Patented Dec.14, ,1926. i

UNITED sr Application medinay 1'2, 1922,v seriarNo. 560,396, ami in Great Britain November 2e, 1921-.

rThis invention relates vto mercury, and other vapor, electric lamps of the atmospheric type, of the general character, for 1nstance, of lamps such as are described inthe 5 specifications of British Letters Patent Nos. 5,596 and 21,834 A. D. 1908, No. 14,587. A. D. 1911, No. 129,022 A. D. 1919, and particularly No. 172,666 A. D. 1920, the object of the presentinvention being to provide means by which the mercury, or other'metallic substance, to be'employed in the lamps, can be readily introduced and withdrawn so that the lamps can be transported from place Ito place Without containing mercury, or the like, and the mercury, or the' like, be introduced, by even an inexperienced person, at the place where the lamps are to be used` According to thisinvention the lamp is provided, in any convenient position, or positions, with an opening, or openings, of suf- {icient size to allow of the convenient introduction and removal of the mercury, o'r the like, which We will refer to asI mercury. The said opening', or openings, may, for example,

v be at the. endo1- ends, of a small tube or1 neck, or of small tubes, communicating with the interior of the lamp. For this opening, or for each of these openings, a device for 'closing-it Such as .a plug, or stopper, (we will refer to it as a plug) is provided, which plug can be made of fused quartz-glass, or of ordinary glass, or ofother lsuitable material, and be ground to fit into the ground opening which it is to close. lEach plug can, if necessary, be provided with additional means to keep it' securely in position. after thel mercury has been introduced into the lampr and any necessary conductor can be Vpassed through the plug,"or each plug, and 4o' any suitable Contact, or contacts, or other device in connection with the lamp, can be combined with the plug; for instance, a contact `may be included to complete any required circuit, or circuits, when the plug is, or plugs are, in pilace; or the plug may carryl the U-shaped tu e described in the specitb cation and shown vat 13'in the drawing of the aforesaid British Patent 172,666, to allow, of the escape of air 'from the lamp when itis being started; or the plug may be made as` part of the tubular projection and'slnallv container for the mercury with which contactis made for putting the heater of the lamp out of circuit Whcnfthe lamp has beenl started; or the plug can be simply perforated FRANK ARTHUR KING, or .siriana GREEN, LONDON, AND rRnDERrcignrNoLpsQo v.WALiri-:12111131.12oN-TYNE; ENGLAND.

' 'VAPon ELECTRIC LAMP. f' 'jito allow of the escape of air when the lamp is started. \T

The accompanying drawing represents, in

section, suliicient of one end of a `mercury vapor electric lamp to explain various Ways e04 in which means, in accordance with. this invention, can be applied to lamps such` as are described in the specification of the aforesaid British Patent No. 172,666. In the several Figures, l, 2 and3,'correspond- B ing parts are marked with the same refer-` ence letters. Fig. t is a plan view Vof the heater 7c for starting the lamp.

. Referring first to Liigure 1:-Tl1e opening' ata for the introduction and Withdrawal of mercury, is at the upper end of the"tubi1lar neck or projection b Which communicates with the interior 'of the extension c, which -holds the mercury which Ais displaced from the mercury receptacle at one end of the lamp when it is put into action.` The opening, at a, of the tubular projection b, is provided with a plug d, which may be pre?,v sumed to be made of quartz glass the said opening a and the saidv plug d being ground to givea good closure.

'In Figure 2 is shown a modification wherein the plug" lel, andthe U-shaped tube e, for the escape of air 'when the lamp Ais*y started, are made in one piece the plug- 95 portion al, fitting linto theopening a, at the upper end ot the tubular project-ion, or extension, b, the plug portion d being' madev hollow, 'with an opening f at top, so thatthe interior of the plug portion d, and the opening f, constitute a continuation of the air-passage through the U-shaped tube'e. v

Figure 3 shows a modification wherein the plug d, is hollow and is formed as part of the tubular projection g2 and small container, or bulb, g, which is for containing the lmercury with which contact is. made when the lamp is started. In this case, if 1 desired, the air, when the lamp is started,

can escape through'the openings in the bulb 100 g, and out by the opening f, from the inte rior ot the plug-portion d, or an independ-l ent air-escape passage can be provided. At la., we have indicated cement which may be used to malte a good joint.

As before stated, a small opening for the escape ot air may be made through the plug (l,- Figurc 1, if desired.

lVhat we. Claim iszv n A vapor electric lamp of atmospheric 'type v11,0

hev'ng 'neckv'forming a tbular opening from therece tacle for the materialvapol'- izable when t e lainp is put into `action in combination .with a removable plug of the U lsame materiel' as that, of th'eneck'a'dapted to close the opening of said neck and to pel mit'ready-removal of the va orizable material when desired, said -plug including a Viu condutpr 'and also including a small contailler Subbl fm the vaporzable material contact. r l 11.1 testimony Whelef we have signed our ,nemesio this speccatip.

I FRANK ARTHUR KING.'

FREDERICK REYNOLDS, 

